Active mapping is fine, but passive mapping is better quality and a lot easier for inexperienced contributors.
For example, look at mapillary - turn on your phone and walk, and you capture a lot of data that is much more useful for experienced mappers to draw on. We get street signs from image recognition.

Another good example of passive mapping - strava users don't know a thing about how to upload a GPX track or OSM tagging schema in general, but generate great quality heatmaps that can be turned into mappable features.

You can do the same with opening hours based on user location. You can gather data by hooking into people sharing their location with friends, and opting to make that available to OSM for mapping purposes.

Is it going to be 100% accurate? Probably not - but we already see commercial vendors (foursquare, google, etc) taking user locations for these purposes - there is value there.

Would I prefer open tools that let me do the same as them, but with more control of the data I share? Absolutely.

The one problem with passive mapping is that nobody does it. Many experienced mappers have tons of GPS traces and thousands of photos and some walking papers, just archived somewhere, unprocessed. Collecting data is fun, adding it to the map — not so.

And if the data is even slightly inaccurate, experienced mappers would not tolerate it. Just look at the response to small error maps.me users make.

@CloCkWeRX: What schemas were you thinking of utilizing? Truthfully, I've had the "smart questions" web app idea too. It's on the back burner until .NET Core matures a bit. The idea was to add some gamification to it to entice users(/players) to contribute more data. I guess kinda like many of the leader boards out there for other osm enabled apps.

@Zverik: Don't count us armchair mappers out! I feel much more comfortable doing the mapping in iD than out and about! :)

For the 'smart questions' apps; there have been a few that made some progress (but then stalled). I think https://wiki.openstreetmap.org/wiki/Kort_Game was one of the more sophisticated - I'm happy that things like MapSwype also got off the ground since I last looked.